Which expression is equivalent to −4.6+(−0.4)+(−7.2) ? (4.6+0.4+7.2) −4.6−(0.4+7.2) (4.6+0.4)+(−7.2) −(4.6−0.4)+(−7.2)
1 answer:
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Step-by-step explanation:
It is given that, three oil tankers together contain 37 5/7 litres of oil.
Total volume of oil is
If two tankers have 11 3/14 litres and 12 3/7 litres of oil.
Oil in first tanker is
Oil in second tanker is
Oil in first and second tanker is :
Noo, oil in the third tanker = total volume - (Oil in first tanker + second tanker )
Hence, this is the required solution.
The length of the rectangle is based on its width, so let's call width w and put the length in terms of the width. We are told that the width is 45 less than 4 times the width, so the length is 4w - 45. Area is found by multiplying length times width and we are given the area as 3325. So we will set up length times width and solve for w, which we will then use to solve for l. 3325 = (4w - 45)(w). Multiplying out we have . Move the constant over by subtraction and then we will have a quadratic that can be factored to solve for w.
. We would put that through the quadratic formula to solve for w. When we do that we get that w = 35 and w = -23.75. The 2 things in math that will never EVER be negative is time and distance/length, so -23.75 is out. That means that the width is 35. The length is 4(35) - 45 which is 95. The dimensions of your rectangle are length is 95 and width is 35. There you go!